Remote Installation

I am currently looking at reinstalling a ZCS after a complete server death (both hdds in raid1 burned with the controller).

I have two questions:
1. Is there a specific manual for CentOS5, or maybe I'd better stick to CentOS4Server Edition?

2. I have no physical access to the server. I do have SSH support, but obviously it's a bit of a problem to ssh into a machine that isn't installed yet. So is there a way to somehow load a minimal ssh shell and install the server from that?